| 摘要 |
The invention belongs in the sphere of heating technology. It is intended for saving energy. By utilising the movement of the combustion air of heating appliances, air inlet ducts are according to the invention assigned to the heating air flow. Due to the chimney effect of the air inlet ducts the heating air flow is increased. Due to the funnel-shaped enlargement of the air outlet shaft a larger cross section of the heating air outlet is achieved. This enlargement produces the optimum functioning of the air inlet ducts. The secondary air obtained from the air inlet ducts due to the ascending current of heating air does not produce any acceleration of the heating air but, due to the enlargement of the air outlet shaft, an increase of the air outlet flow. The drive force from the heating air and the secondary air generates current by way of a large-bladed generator, the ratio of heating air movement and secondary air flow being the determining factor. One possible application would be the self propelling heating fan as shown in the attached drawing, Fig. 1. <IMAGE>
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